ok so i have a 2006 kia optima. i bought an eclipse cd 1200 stereo. it sounds pretty good with the stock speakers. i was wondering.... should i buy subs or speakers first. or is it just much better to get both. i don't want to spend a lot. i was looking to spend about 120 on some speakers. i want some good lows but i know that you don't normally get them with just speakers. so could i just buy subs or should i get good speakers to go with them?